ref: 6b150c2884592c20a8cb4a1c19f711b130e4c427
parent: f73b21439d05e71451d51222f557a59fad0256db
author: Dmitry Kovalev <dkovalev@google.com>
date: Mon Jan 6 07:23:36 EST 2014
Combining ref_frame and second_ref_frame into ref_frames[2]. Change-Id: I007d66a1cb1b44751dcceafbaa64649ed9a34562